Container



Sept. 11, 1923.

J. C. KING ET AL CONTAINER Filed Feb. 2, 1920 m m w V M Jesse C. Kl

Patented Sept. ll, 1923.

U STTS lAtlfitZ PATENT @FFHCE.

JESSE 0. KING AND WILLI S. NISH, OF MONTREAL, QUEBEC, CANADA, ASSIGNORS T0 CANADA CARBIDE COMPANY, LIMITED, OF MONTREAL, CANADA.

CONTAINER.

Application filed February 2, 1920. Serial No. 355,731.

To all whom it may concern:

Be it known that we, Jnssn C. KING and WILLIAM S. Nrsrr, a citizen'of the United States and subject of the King of Great Britain, respectively, and both residents of the city of Montreal, in the Province of Quebec and Dominion of Canada, have invented certain new and useful. Improvements in Containers, of which the following is a full, clear, and exact description.

This invention relates to improvements in containers and methods of making same, and the object of the invention is to provide a strong, durable container which may be hermetically sealed :1. number of times.

A further object is to provide a container particularly adapted for the shipment of calcium carbide and other-substances which are injured by moisture.

A still further object is to provide a novel method of constructing containers.

At the present time containers in general use for shipping calcium carbide and the like are merely large sheetmetal cans with seamed-on ends. Owing to the seamed construction comparatively thin met-a1 must be used, with the result that the container must be crated or cased in wood. to protect it from injury. When such cans have been used a number of times the seams connecting the end-s become battered and torn so that they aredangerous to handle and are no longer suitable for their original purpose. It frequently happens that such containers become burst-o en at the vertical side seam owing to swe ling of the contents or, conversely, become so dented that the seams are opened and the receptacle holds considerably less than its rated capacity.

According to the present invention a container may be constructed which overcomes all the disadvantages noted above. The container is composed of two cup-shaped portions connected at their edges by welding and also by a rolled seam at the line of connection which strengthens the container and conceals any irregularities due to the welding. The use of welding to connect the parts enables much heavier metal to be used than is pomible in the ordinary type of container with the result that a stronger container is obtained which will not require crating or casing with wood. The use of two drawn or stamped cup-shaped members to form the container enables the edges of the can to be rounded and eliminates the disadvantages inherent to the sharp seamed edges. The step of drawing or stamping the sheet-metal for the two cups of which the container is composed so hardens the metal at the cup edges that rolling would be im possible but this is overcome by the welding ste before the seaming, the heat of the we ding being sufficient to anneal the edges so that they can be safely rolled or seamed.

In the drawings which illustrate the invention Figs. 1 and 2 are vertical, sectional views of the cups or blanks from which the container is formed.

Fig. 3 is a sectional view of the cups formed ready for connection.

Fig. 4 is a fragmentary, sectional View of the complete connection.

Fig. 5 is a sectional view illustrating the method of sealing the cover.

Fig. 6 is a diagram illustrating a modified form of construction.

Referring more particularly to the drawings, 11 and 12 design-ate a pair of cup shaped members which are stamped, pressed or drawn from flat sheet-metal to form respectively upper and lower portions of a container. The upper cup 11 is provided in its bottom with an aperture 13. These cups are treated to a rolling operation which forms externally projecting ribs 14 designed to protect and stiffen the receptacle. The edge of each cup is also flanged as at 15, preferably in an outward direction. The metal around the opening 13 of the upper cup is suitably pressed or spun to form a neck, 16 for the reception of closure means. In making the container the cup 11 may, if desired, be slightly deeper than the cup 12, shown in Figures 1 and 2, and in the flangilrg operation the flange of the upper cup 11 may be turned outwardly a greater distance so that the upper cup will be shallower than the lower cup, with the result that when the two cups are placed together the line of connection will be slightly past the central, transverse plane 17 of the container so that the complete seam will be exactly midway between the ends of the container. The two cups with their flanges abutting, as shown in Figure 3, are now welded together, as at 18, as clo'se as possible to the wall of the container, preferably by means of very closely arranged electricspot-welds connecting the flanges. The operations of drawing the cups and rolling the flanges so hardens the metal that further forming of the flanges is impossible without grave danger of breaking .the metal. The

welding operation heats the flanges sufficiently to anneal them and enable them to be rolled down to the form shown in Figure 4, producing a seam substantially identical in appearance with the rolled ribs 14 though not necessarily of the same size. This method of welding and seaming provides an extremely strong, integral hoop or band at the centre of the container which will very materially stifi'en the same. v

The neck 16 may be formed in any suitable manner, as for instance, by the provision of an upper inturned portion 19 and a lower inturned portion 20 of similar diameter and connected to the upper portion by a fiat seat portion 21. The inner or lower neck portion 20 may be threaded either by rolling or cutting the metal to receive a screw-cap 22 having a flange 23 adapted to rest upon the seat 21. A compression cap 24 may be pressed into the upper neck portion to cover and protect the screw-cap. Before their application either or both of these cover members may be coated with a sealing material 25 such as rubber-cement which will fill any irre ularities between" the caps and neck and material is preferably of a nature which will adhere to the caps and provide the de-, sired sealing effect during re-use of the container.

While the container has heretofore been shown as composed of two cups directly connected together it will be obvious that the same result may be obtained by the use of shallower cups 11 and 12 connected to opposite ends of a cylindrical, central portion 26 which may be either a short length of seamless tube or a strip of metal bent to a cylindrical form and havin its ends se- (ured together as at 27. he method of connecting the cups and cylindrical portion may be the same as previously described or ma be by means of ordinary butt welds.

aving thus described our invention, what we claim is A method of making containers which consists in providing a pair of cup shaped members, flanging the edges of said 1ne1n bers, Welding the flanges together to unite and simultaneously anneal them and subsequently rolling the annealed flanges down upon the body of the container to form a strengthening rib.

In witness whereof, we have hereunto set our hands.

JESSE o. KING. WILLIAM s. NISH. 

